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Table 3 Demographic and clinical parameters in the acute kidney injury (AKI) group according to the RIFLE-classification

From: Risk assessment of acute kidney injury following cardiopulmonary bypass

Parameter RRT* p-value (chi-squared test)
No Yes
n = 3323 n = 251
Sex
 Male 2341 (70%) 181 (72%)  
 Female 981 (30%) 70 (28%) 0.62
Bypass surgery
 Yes 2520 (76%) 207 (82%)  
 No 803 (24%) 44 (18%) 0.02
Valve surgery
 Yes 1157 (35%) 94 (37%)  
 No 2166 (65%) 157 (63%) 0.10
Temperature
 Normothermia 2554 (76%) 177 (71%)  
 Mild hypothermia 734 (22%) 63 (25%)  
 Deep hypothermia 65 (2%) 11 (4%) <  0.01
Surgery
 Bypass 2037 (61%) 153 (61%)  
 Valve 596 (18%) 30 (12%)  
 Bypass+valve 445 (13%) 50 (20%) < 0.01
  1. *means renal replacement therapy